HP 0231A63F - HP router 1-Port OC-3 ATM(Asynchronous Transfer Mode), FIC(Flexible Interface Card) Retail
HP 0231A99D - 6600 1-port OC3c/STM-1c ATM HIM router module - Hardware Interface Module (HIM) with one OC-3 SFP port providing Asynchronous Transfer Mode (ATM) interface rates up to 155.52Mbps (STM-1c/OC-3c) Retail
HP 0231A986 - 6600 2-port OC3c/STM-1c ATM HIM router module - Hardware Interface Module (HIM) with two OC-3 SFP ports providing Asynchronous Transfer Mode (ATM) interface rates up to 155.52Mbps (STM-1c/OC-3c) Retail